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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Just so i have what your saying straight, This check works because letters return 2 different values when using toUpperCase or toLowerCaser. However, because numbers and symbols return the same value regardless of which function is used, it proves that input is not a letter.
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